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80c663882a
Summary: First draft. Unit tests pass. Test Plan: unit tests attached Reviewers: heyongqiang Reviewed By: heyongqiang Differential Revision: https://reviews.facebook.net/D3969
121 lines
3.8 KiB
C++
121 lines
3.8 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#ifndef THRIFT_TPROCESSOR_H_
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#define THRIFT_TPROCESSOR_H_ 1
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#include <string>
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#include <vector>
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#include "thrift/lib/cpp/EventHandlerBase.h"
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#include "thrift/lib/cpp/server/TConnectionContext.h"
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#include "thrift/lib/cpp/protocol/TProtocol.h"
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#include <boost/shared_ptr.hpp>
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namespace apache { namespace thrift {
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/**
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* A processor is a generic object that acts upon two streams of data, one
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* an input and the other an output. The definition of this object is loose,
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* though the typical case is for some sort of server that either generates
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* responses to an input stream or forwards data from one pipe onto another.
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*
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*/
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class TProcessor : public TProcessorBase {
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public:
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virtual ~TProcessor() {}
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virtual bool process(boost::shared_ptr<protocol::TProtocol> in,
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boost::shared_ptr<protocol::TProtocol> out,
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TConnectionContext* connectionContext) = 0;
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bool process(boost::shared_ptr<apache::thrift::protocol::TProtocol> io,
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TConnectionContext* connectionContext) {
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return process(io, io, connectionContext);
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}
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protected:
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TProcessor() {}
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};
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class TProcessorFactory {
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public:
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virtual ~TProcessorFactory() {}
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/**
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* Get the TProcessor to use for a particular connection.
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*
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* This method is always invoked in the same thread that the connection was
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* accepted on. This generally means that this call does not need to be
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* thread safe, as it will always be invoked from a single thread.
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*/
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virtual boost::shared_ptr<TProcessor> getProcessor(
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server::TConnectionContext* ctx) = 0;
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};
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class TSingletonProcessorFactory : public TProcessorFactory {
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public:
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explicit TSingletonProcessorFactory(
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const boost::shared_ptr<TProcessor>& processor) :
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processor_(processor) {}
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boost::shared_ptr<TProcessor> getProcessor(server::TConnectionContext*) {
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return processor_;
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}
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boost::shared_ptr<TProcessor> getProcessor() {
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return processor_;
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}
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private:
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boost::shared_ptr<TProcessor> processor_;
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};
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/**
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* This is a helper class to allow boost::shared_ptr to be used with handler
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* pointers returned by the generated handler factories.
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*
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* The handler factory classes generated by the thrift compiler return raw
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* pointers, and factory->releaseHandler() must be called when the handler is
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* no longer needed.
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*
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* A ReleaseHandler object can be instantiated and passed as the second
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* parameter to a shared_ptr, so that factory->releaseHandler() will be called
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* when the object is no longer needed, instead of deleting the pointer.
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*/
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template<typename HandlerFactory_>
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class ReleaseHandler {
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public:
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explicit ReleaseHandler(
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const boost::shared_ptr<HandlerFactory_>& handlerFactory) :
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handlerFactory_(handlerFactory) {}
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void operator()(typename HandlerFactory_::Handler* handler) {
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if (handler) {
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handlerFactory_->releaseHandler(handler);
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}
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}
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private:
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boost::shared_ptr<HandlerFactory_> handlerFactory_;
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};
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}} // apache::thrift
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#endif // #ifndef THRIFT_TPROCESSOR_H_
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